2021 Silicon Valley Classic

The 2021 Silicon Valley Classic (also known as the Mubadala Silicon Valley Classic for sponsorship reasons) was a professional tennis tournament played on hard courts. It was the 49th edition of the tournament, and part of the WTA Premier tournaments of the 2021 WTA Tour. It took place between 2 and 8 August 2021 in San Jose, California. It was the first women's event on the 2021 US Open Series.

Singles

 * 🇺🇸 Danielle Collins def. 🇷🇺 Daria Kasatkina, 6–3, 6–7(10–12), 6–1

Doubles

 *  Darija Jurak / Andreja Klepač def. 🇨🇦 Gabriela Dabrowski / 🇧🇷 Luisa Stefani, 6−1, 7−5

Seeds

 * Rankings are as of July 26, 2021.

Other entrants
The following players received wildcards into the main draw:
 * 🇺🇸 Claire Liu
 * 🇬🇧 Emma Raducanu

The following player received entry using a protected ranking:
 * 🇺🇸 CoCo Vandeweghe

The following players received entry from the qualifying draw:
 * 🇺🇸 Emina Bektas
 * 🇰🇷 Han Na-lae
 * Ana Konjuh
 * Lesley Pattinama Kerkhove

Withdrawals

 * Before the tournament
 * 🇷🇺 Ekaterina Alexandrova → replaced by 🇫🇷 Kristina Mladenovic
 * 🇪🇸 Paula Badosa → replaced by 🇫🇷 Caroline Garcia
 * 🇺🇸 Sofia Kenin → replaced by 🇨🇿 Marie Bouzková
 * 🇷🇺 Veronika Kudermetova → replaced by 🇺🇸 Caty McNally
 * 🇨🇿 Karolína Muchová → replaced by Donna Vekić
 * Jeļena Ostapenko → replaced by Anastasija Sevastova

Seeds

 * 1 Rankings are as of 26 July 2021.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇺🇸 Makenna Jones / 🇺🇸 Elizabeth Scotty
 * 🇺🇸 Ashlyn Krueger / 🇺🇸 Robin Montgomery

The following pair received entry as a alternates:
 * 🇺🇸 Peyton Stearns / 🇺🇸 Maribella Zamarripa

Withdrawals

 * Before the tournament
 * 🇨🇿 Marie Bouzková / 🇨🇿 Lucie Hradecká → replaced by 🇺🇸 Peyton Stearns / 🇺🇸 Maribella Zamarripa
 * Chan Hao-ching / Latisha Chan → replaced by 🇫🇷 Elixane Lechemia / 🇺🇸 Ingrid Neel
 * 🇺🇸 Desirae Krawczyk / 🇺🇸 Bethanie Mattek-Sands → replaced by 🇺🇸 Emina Bektas / 🇬🇧 Tara Moore
 * 🇮🇳 Sania Mirza / 🇺🇸 Asia Muhammad → replaced by 🇳🇿 Erin Routliffe / Aldila Sutjiadi